# 线程学习
# 我们可以通过直接从 threading.Thread 继承创建一个新的子类，
# 并实例化后调用 start() 方法启动新线程，即它调用了线程的 run() 方法：
import threading
import time


class myThread(threading.Thread):
    def __init__(self, threadID, name, counter):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter

    def run(self):
        print("开始线程:" + self.name)
        print_time(self.name, self.counter, 5)
        print("退出线程:" + self.name)


def print_time(threadName, delay, counter):
    while counter:
        time.sleep(delay)
        print("%s:%s" % (threadName, time.ctime(time.time())))
        counter -= 1


# 创建新线程
thread1 = myThread(1, "Thread-1", 1)
thread2 = myThread(2, "Thread-2", 2)

# 开启新线程
thread1.start()
thread2.start()
thread1.join()
thread2.join()
print("退出主线程")
